Finding the Fourth Proportional to 16,216.69, 22,379.06 and 9,143.09

Step by Step Solution

1. Step 1: Write the proportion equation
   16,216.69 : 22,379.06 = 9,143.09 : x
2. Step 2: Convert to fraction form
   16,216.69/22,379.06 = 9,143.09/x
3. Step 3: Cross multiply
   16,216.69x = 22,379.06 × 9,143.09
4. Step 4: Simplify right side
   16,216.69x = 204,613,759.70
5. Step 5: Solve for x
   x = 204,613,759.70/16,216.69
6. Step 6: Final answer
   x = 12,617.48